function insertFlash(elm, url, w, h) {
if (!document.getElementById(elm)) return;
var str = '';
str += '<object width="'+ w +'" height="'+ h +'" classid="clsid:D27CDB6E-AE6D-11cf-96B8-444553540000" codebase="http://download.macromedia.com/pub/shockwave/cabs/flash/swflash.cab#version=7,0,0,0">';
str += '<param name="movie" value="'+ url +'">';
str += '<param name="wmode" value="transparent">';
str += '<param name="menu" value="false">';
str += '<param name="quality" value="autohigh">';
str += '<embed width="'+ w +'" height="'+ h +'" src="'+ url +'" quality="autohigh" wmode="opaque" type="application/x-shockwave-flash" plugspace="http://www.macromedia.com/shockwave/download/index.cgi?P1_Prod_Version=ShockwaveFlash"></embed>';
str += '</object>';
document.getElementById(elm).innerHTML = str;
}

function onlyNum() 
{ 
if(!(event.keyCode==46)&&!(event.keyCode==8)&&!(event.keyCode==37)&&!(event.keyCode==39)) 
if(!((event.keyCode>=48&&event.keyCode<=57)||(event.keyCode>=96&&event.keyCode<=105))) 
event.returnValue=false; 
} 
function checklogin() {
	if (document.getElementById("username").value == '' ) {
		window.alert('请输入您用户名!!');
		document.getElementById("username").focus();
		return false;
	}
	if (document.getElementById("password").value == '' ) {
		window.alert('请输入您密码!!');
		document.getElementById("password").focus();
		return false;
	}
	return true;
}

function checksignup() {
	if ( document.form1.username.value == '' ) {
		window.alert('请输入您用户名!!');
		document.form1.username.focus();
		return false;
	}
	if ( document.form1.password.value == '' ) {
		window.alert('请输入您密码!!');
		document.form1.password.focus();
		return false;
	}
	if ( document.form1.email.value == '' ) {
		window.alert('请输入Email地址!!');
		document.form1.email.focus();
		return false;
	}
    if ( document.form1.email.value.length> 0 &&!document.form1.email.value.indexOf("@")==-1|document.form1.email.value.indexOf(".")==-1 ) {
		window.alert('您所输入的电子邮件格式不正确!!');
		document.form1.email.focus();
		return false;
	}
	return true;
}